named object reference Comparison Table

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named object reference comparison table

Subject refer to declare by have be have scope is a kind of is a subtopic of cascade you have syntax rule have purpose destroy in access by have access modifier has part have access mode represent contain be not accessible

null a class or an object or a primitive datum giving the data type followed by the name of the variable a type a label for a chunk of memory that holds the memory address for a chunk of memory that holds and instance named object reference Variables and Data Types prepend a class or package names to a reference with the character '.'
bold = mandatory
italic = non-terminal
normal font = optional
to refer to an object indirectly so the object may be moved or reclaimed the block where it is declared other variables and methods in any class in the same package by default
public
or private
or protected
value an invalid or uncreated object only values that are of the same type as the variable or a subtype of the variable's type to the programmer except for the equals method

Subject	refer to	declare by	have	be	have scope	is a kind of	is a subtopic of	cascade you	have syntax rule	have purpose	destroy in	access by	have access modifier	has part	have access mode	represent	contain	be not accessible
null	a class or an object or a primitive datum	giving the data type followed by the name of the variable	a type	a label for a chunk of memory that holds the memory address for a chunk of memory that holds and instance		named object reference	Variables and Data Types	prepend a class or package names to a reference with the character '.'	bold = mandatory italic = non-terminal normal font = optional	to refer to an object indirectly so the object may be moved or reclaimed	the block where it is declared	other variables and methods in any class in the same package by default	public or private or protected	value		an invalid or uncreated object	only values that are of the same type as the variable or a subtype of the variable's type	to the programmer except for the equals method

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